Learning Forum

[junpyo]

Hello,

 

I asked a question before (/forum/forums/topic/definition-of-mag_j-complexmag_j-and-ohmicloss/?reply=baffaf08-a7dc-4540-b8eb-abfe00e00587#createpost) but after a very fast reply, I didn't get a follow-up reply. So I am starting a new thread.

 

I am working on toroid inductor simulation (Maxwell 3D eddy-current solution) to understand the eddy current and the loss created in my laminated core. I checked out the online help but I still am not completely sure what Mag_J and ComplexMag_J means. I guess ComplexMag_J is just an amplitude of varying J (Fm or Im). Then what's Mag_J? Is it just the real part of J or amplitude of varying J at a certain phase?

 

Regarding ohmic loss calculation:

The definition has the term, J multiplied by J conjugate. Is that J, complexMag_J or Mag_J or something else? So, an ohmic loss is directly correlated to complexMag_J instead of Mag_J?

 

Thank you for your help.

[Mark Christini]

In the Eddy Current (frequency domain) solver, J_vector is a complex vector with real, imag components in 3 spatial directions: Jx, Jy, Jz. 

1)     Using the calculator, Mag_J returns real component of SQRT (Jx^2 + Jy^2 + Jz^2).

2)     Ohmic loss uses J_vector and is defined as: integral (J_vector dot J_vector(conj) /2 conductivity) dV (Reference formula in Maxwell online help topic “Ohmic Loss for an Eddy Current Solution&rdquo